You just have to drill down to what her primary objection is, then overcome that.
I have a small house, wife was worried about both size and looks. She pictured an ugly white chest freezer with tap handles. I made a very basic stained 4" collar with stainless tower. It came out looking way better that what she had pictured in her head and smaller. She loves it (it helps a lot that she really likes beer).
It cost about $1k total, but I used only 1/3 of some extra money we got that we weren't counting on getting, so she got the other $2k for bills etc.